He left home in 1980 and has never come back ____.
| A．though | B．while | C．when | D．since |
Between 1918 and 1938, many new stations were constructed,__________ was designed by an architect named Charles Holden.
| A．the most famous of which | B．the most famous of them |
| C．the most famous of whom | D．and the most famous of which |
The doctor advised her to eat more bean products _____meat which might be harmful to her heart disease.
| A．for lack of | B．by means of |
| C．as a substitute for | D．in favor of |
With credit cards ________ available, it is more frequent to see consumers pay for their purchases or bills by card instead of by cash.
| A．occasionally | B．merely |
| C．relevantly | D．abundantly |
------You went to the“Bird’s Nest”last month, didn’t you？
------Yes. That was the second time I ________ to Beijing National Stadium.
| A．have been | B．were |
| C．had been | D．would be |
It was ________ that we tried to make him change his mind.
| A．paid off | B．in vain |
| C．took off | D．in effect |